Allow option to bypass certificate verificaiton

[BRONSOLO]

On-Premise clients using self-signed certificates will sometimes hit the following error:

Error in curl::curl_fetch_memory(url, handle = handle) :
Peer certificate cannot be authenticated with given CA certificates

This can be resolved by bypassing certificate checking by adding the following line before making the request:

httr::set_config(config(ssl_verifypeer = 0L))

It would be nice if this option were configurable within the Plotly .config file.